AL-KO AK7 Ball Coupling, Version C. Permissible axle load: 750 kg. Permissible vertical load: 75 kg. Extraction tube: Ø 70 mm. Round with 3 holes. Distance between vertical holes: 90/116 mm. Holes: 12.5 mm. FORMA: REDONDO ZUGROHR (DEICHSEL): 70 MM SCREWED IN: FROM ABOVE HOLE SPACING: 90 MM HOLE: 12.5MM ACHLAST: 750 KG STÜTZLAST: 75 KG